Ignore item qty validation if zero qty entered in grouped product

Author: Mohamed-Asar

app/code/Magento/GroupedProduct/view/frontend/templates/product/view/type/grouped.phtml

@@ -56,6 +56,7 @@
                                title="<?= $block->escapeHtmlAttr(__('Qty')) ?>"
                                class="input-text qty"
                                data-validate="<?= $block->escapeHtmlAttr($viewModel->getQuantityValidators($_item->getId(), $_item->getWebsiteId())) ?>"
+                               data-no-validation-for-zero-qty="true"
                                data-errors-message-box="#validation-message-box"/>
                     </div>
                 <?php else: ?>

lib/web/mage/validation.js

@@ -1643,6 +1643,9 @@ define([
                     isQtyIncrementsValid = typeof params.qtyIncrements === 'undefined' ||
                         resolveModulo(qty, $.mage.parseNumber(params.qtyIncrements)) === 0.0;
 
+                if ($(element).data('no-validation-for-zero-qty') === true && qty === 0) {
+                   return true;
+                }
                 result = qty > 0;
 
                 if (result === false) {